20211221220122 has 8 divisors (see below), whose sum is σ = 30452781749376. Its totient is φ = 10060293970332.

The previous prime is 20211221220121. The next prime is 20211221220131. The reversal of 20211221220122 is 22102212211202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20211221220094 and 20211221220103.

It is not an unprimeable number, because it can be changed into a prime (20211221220121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22658319308 + ... + 22658320199.

It is an arithmetic number, because the mean of its divisors is an integer number (3806597718672).

Almost surely, 2^{20211221220122} is an apocalyptic number.

20211221220122 is a deficient number, since it is larger than the sum of its proper divisors (10241560529254).

20211221220122 is a wasteful number, since it uses less digits than its factorization.

20211221220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45316639732.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20211221220122 its reverse (22102212211202), we get a palindrome (42313433431324).

The spelling of 20211221220122 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty-two".